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Old 04-21-2016, 10:45 PM   #1
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Purchased trailer used several years ago. I grease bearings manually every year. I noticed these burn/rust marks every year. I sand the marks off with very fine emerycloth but the marks come back every year. I would replace all bearings and races but the axles have these marks. Any clue as to what it's from....? I was told trailer sat alot very little use.
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Old 05-04-2016, 12:02 PM   #2
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Maybe from heat, all though usually bluish in color, are your brakes running hot?

Dodge Durango 5.7 Hemi
2010 Primetime Tracer 3000 BHS Lemon
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Old 05-04-2016, 12:12 PM   #3
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It may be from rust inside the wheel bearings. You could try cleaning the bearings in a solvent but I would try replacing a bearing set for a wheel and see if that fixs the problem.
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Old 05-04-2016, 12:24 PM   #4
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Suspect bearing race may be turning on spindle. I have prick punched a few spindles to tighten the race so it won't spin. Should not be rust with all the grease on it. Check your inner bearing very closely for pitted rollers or race.
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axle, bearings

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